Lathe vs. Milling Machine: Key Differences & When to Use Each

Modern manufacturing plants use both lathe and milling machines. Each of these machines operates on a similar machining process called subtractive machining. This is a process that begins with a block of material. The next phase is to shape it according to your desired specifications. 

Shaping of the material is the key difference between a lathe vs milling machine. If you wish to understand the difference between a milling machine vs lathe, this post is for you. 

What is a Lathe and How Do They Function? 

A lathe is one of the most widely used and versatile machines in the world. A lathe rotates your workpiece on its fixed axis and performs a variety of operations such as knurling, facing, cutting, etc. 

An alternate term for the lathe is “turning,” as it is most effective when creating cylindrical parts. Other common operations in the lathe include parting, boring, threading, drilling, OD, and ID grooving. If you are looking for a process to create repeatable, quick, cylindrical symmetrical parts, a lathe is the best choice. You can use it to work on both wood and metal. 

You can create various products using a lathe. These include: 

• Engine part repairs
• Test Gauges
• Flanges with bolt patterns
• Hydraulic/Pneumatic cylinders 
• Manufacturing rolls for: Print, food, textile, conveyors 

Variations of a Lathe

A lathe comes in several variants, such as: 

• Wood lathe/speed lathe
• Capstan and Turret 
• Engine lathe
• Flatbed Lathe
• Tool-Room lathe

There is also a special purpose lathe that you can divide into several sub-variants such as: 

• Automatic lathe
• Bench-type jewelers lathe
• Wheel lathe
• Blown glass
• Pottery
• Bolt threats
• Patterned metal surfaces

What is a Milling Machine and How Do They Work? 

A milling machine has cutters that rotate to reduce the material used to give it the desired shape. Nowadays, the milling machine is one of the common tools factories use to create products of different shapes and sizes. 

Unlike a lathe, a milling machine operation involves the machine rotating about its axis without rotating the workpiece. This allows your tool to approach the workpiece from a different angle in many orientations to create more complex and intricate parts. 

Just like a lathe, you can use a milling machine to create a wide range of products like: 

• Air-lock doors (Air, vessels, submarine) 
• Injection mold dies 
• Manifolds
• Gear-box repair 
• Engine part repairs 
• Test gauges
•  Flanges with bolt patterns 

Variations of a Milling Machine

Some of the milling machine variants include:

• Horizontal milling machine
• Knee-type milling machine
• Vertical milling machine
• Ram-type milling machine
• CNC milling machine
• Bed-type or manufacturing milling machine
• Planer-type milling machine

Lathe Vs Milling Machine: the Differences

The primary difference between the two is the tools used in the process.  A lathe uses a tool known as an insert cutter with a removable tip. This insert cutter helps you cut the material and create different shapes. 

On the other hand, an insert cutter is not a common feature in milling machines. A milling machine uses an end mill that you can operate at different speeds at different angles for precision. 

Another difference when comparing a lathe vs a milling machine is the task you can achieve. Apart from the above-mentioned tasks, you can use a lathe for 

• Facing
• Counter-boring
• Drilling
• Reaming
• Spot facing
• Sanding
• Chamfering

On the other hand, a milling machine is great at the following tasks:

• Facing
• Plain milling
• Side milling
• Milling grooves, slots, and keyways
• Sawmilling
• Straddle milling
• Helical milling 

Conclusion

When comparing a milling machine vs. a lathe, always remember the following differences. If you wish to cut wood or metal that is cylindrical in shape, it is always best to opt for a lathe. This will help you perform the task precisely with easier cutting. 

On the other hand, if you wish to drill holes, a milling machine is an effective solution because a lathe can only drill the center of your material as it rotates on a fixed axis. Using a milling machine will allow you to make holes from any direction as well as perform straight cuts.

In simple terms, if you wish to cut material at angles and intend to work on various non-cylindrical materials, a milling machine is the best choice available. 

As a good manufacturer, you need a machine best suited for the type of material and designs you will be working on. So, you must carefully consider lathe vs. milling machine before making a purchase. Are you looking for a lathe or milling machine? Summit Machine Tool can provide you with the best solutions available in the market. Get a quote or speak to a machine tool expert on our toll-free number today.